By Li Yan, Zongmin Ma
Databases are designed to aid information garage, processing, and retrieval actions with regards to facts administration. using databases in quite a few purposes has led to a major wealth of information, which populates many sorts of databases round the world.Advanced Database question structures: strategies, purposes and applied sciences specializes in applied sciences and methodologies of database queries, XML and metadata queries, and purposes of database question platforms, aiming at supplying a unmarried account of applied sciences and practices in complicated database question structures. This booklet offers the cutting-edge details for lecturers, researchers and practitioners who're attracted to the learn, use, layout and improvement of complex and rising database queries with final target of establishing advantage for exploiting the possibilities of the information and information society.
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Additional info for Advanced Database Query Systems: Techniques, Applications and Technologies
2004). Learning to cluster Web search results. Proceedings of the 19th Annual International ACM SIGIR Conference on Research and Development in Information Retrieval, (pp. 210–217). 26 Automatic Categorization of Web Database Query Results KEY TERMS AND DEFINITIONS Categorizing Attribute: an attribute that is used for partitioning the set of tuple into an ordered list of mutually disjoint subcategories. Category Cost: an estimated cost of finding all relevant tuples by exploring the category tree, it consists of the cost of visiting tuples in a leaf node, the cost of visiting intermediate nodes, and the cost of visiting tuples in intermediate nodes if the user chooses to explore it.
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Each subject was given a tutorial about how to use this interface. Next, each subject was given the results of 5 queries listed in Table 2, which do not appear in the query history. For each such query, the subject was asked to go along with the trees generated by the three algorithms mentioned above, and to select 5-10 houses that he would like to buy. Categorization Cost Experiment The experiment aims at comparing the cost of three categorization algorithms and showing the efficiency of our categorization approach.
Advanced Database Query Systems: Techniques, Applications and Technologies by Li Yan, Zongmin Ma